How to prune mahonia pinnacle

Late spring, just after flowering (typically March–May depending on location). Use bypass loppers and sturdy gloves to remove dead or awkward stems at the base. For shape correction, cut stems back by no more than one-third to a sideshoot. Hard renovation — cutting all stems to 15–30 cm — is an option for badly neglected plants.

Every 2–3 years for light tidying; renovation as needed. Mahonia aquifolium 'Pinnacle' is compact and suckering, reaching around 1–1.5 m, so it rarely needs heavy pruning. Light tidying after flowering maintains shape and removes any dead or crossing stems. It responds well to hard pruning if overgrown, but the holly-like spined leaves make the task uncomfortable — gloves are essential.

Use bypass loppers and sturdy gloves to remove dead or awkward stems at the base. For shape correction, cut stems back by no more than one-third to a sideshoot. Hard renovation — cutting all stems to 15–30 cm — is an option for badly neglected plants.